Revenue Recognition - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total rental property revenues		$ 740,340	$ 657,515	$ 475,212
Rental property revenues
Disaggregation of Revenue [Line Items]
Total rental property revenues	$ 721,900	721,883	628,751	463,401
Variable rental revenue		188,100
Variable rental revenue
Disaggregation of Revenue [Line Items]
Total rental property revenues			176,600	119,300
Fees and other
Disaggregation of Revenue [Line Items]
Total rental property revenues		$ 18,500	$ 28,800	$ 11,800